1  {
 2    "build": {
 3      "preview": {
 4        "channel": "preview",
 5        "android": {
 6          "buildType": "apk"
 7        }
 8      },
 9      "main": {
10        "channel": "main",
11        "android": {
12          "buildType": "apk"
13        }
14      },
15      "testing": {
16        "distribution": "internal",
17        "channel": "testing",
18        "android": {
19          "buildType": "apk"
20        }
21      }
22    }
23  }